- Abbas, Muhammad Khalil and others (2014): Introduction to Research Methods in Education and Psychology, 1st Edition, Dar Al Masirah, Amman, Jordan.

- Abd al-Rahman, Muhammad al-Sayyid (d. D): Theories of Personality, Quba Publishing House, Cairo, Egypt.

- Abdel-Hadi, Aida (2001): Physiology of the Human Body, Amman, Dar Al-Shorouk, quoted from (Al-Zoghbi, 2018)

- Agha, Kazem Wali (1985): Physiological Psychology, 1st Edition, Dar Al-Horizon Al-Jadeeda, Beirut, Lebanon.

- Al-Alami, Ibtisam Muhammad Ahmad (2010): Blood types and some psychological disorders among a sample of male and female students with educational difficulties and ordinary in the elementary stage in Makkah Al-Mukarramah, Umm Al-Qura University, Makkah Al-Mukarramah, College of Arts and Administrative Sciences, (unpublished doctoral thesis).

- Al-Aswad, Fayez Ali (2020): The family context and its relationship to psychological tension among students of the Faculties of Education in the universities of the governorates, Gaza, Palestine, Al-Azhar University, Gaza, Rawafed Journal for Scientific Studies and Research in the Social and Human Sciences, Volume (4), Issue (1), p. Pp. 19-59.

- Al-Atrash, Mahmoud and Ibrahim, Dor Ahashem (2008): Sources of psychological tension for football coaches in the West Bank and suggested solutions for them, An-Najah University Journal for Research (Humanities), Volume (22), Issue (1).

- Al-Dabbagh, Fakhri (1982): Introduction to Psychology, House of Printing and Publishing, University of Mosul, Iraq.

- Al-Dabbagh, Fakhri (1983): The Fundamentals of Psychiatry, Dar Al-Taleea, Beirut, Lebanon.

- Al-Dahdouh, Asma Salman Nassif (2010): Cognitive stayl and their relationship to psychological tension among Palestinian university students, the Islamic University - Gaza, College of Education,( an unpublished master's thesis).

- Al-Dahri, Salih Hassan and Nazem Hashem Al-Obaidi (1999): Personal and Mental Health, Dar Al-Kutub Publishing House, Baghdad, Iraq

- Al-Haffar, Saeed Muhammad (1984): Biology, the Fate of Man, The World of Knowledge Series (38), Kuwait..

- Al-Hamiri, Sahira Qahtan Abdul Jabbar (2001): Psychological tension among sixth-grade middle school students and their parents and its relationship to academic achievement, College of Arts, Al-Mustansiriya University, (unpublished master's thesis).

- Al-Hamiri, Sahira Qahtan Abdul Jabbar (2017): Psychological Tension among Distinguished Students in Baghdad Schools, Journal of the Islamic College of the University - Najaf al-Ashraf, Issue (42), pp. 537-352

- Al-Khalidi, Adeeb Muhammad (2006): A Reference in Clinical Psychology (The Patients), First Edition, Wael Publishing House, Amman, Jordan

- Al-Mulla, Salwa (1982): Psychological Tension, 1st Edition, Dar Al-Qalam, Kuwait.

- Al-Shahadat, Bayan Muhammad Salem (2017): The impact of a cognitive-behavioral counseling program on improving self-esteem and reducing psychological tension among children of Syrian refugees in Jordan, Jordan, Zarqa, College of Graduate Studies at the Hashemite University, (unpublished master's thesis).

- Al-Tikriti, Thanaa Bahaa Al-Din (1995): A counseling program in relaxation to reduce tension associated with neurotic anxiety for students of higher education institutions, Al-Ustath Journal, Issue (13), College of Education, Ibn Rushd University of Baghdad, (published doctoral thesis).

- Al-Zoghbi, Ibtisam Abdullah (2018): Blood groups and the five major personality factors among female students of Princess Noura bint Abdulrahman University, Journal of the Islamic University for Educational and Psychological Studies, Volume (26), Issue (2), 2018, pp. 262-284.

- Amin, Abdul Rahman Lotfi (d.): Anxiety and tension, causes and solutions, Health Awareness Book Series (13), Patients Helping Fund Association.

- Apecu, R., et al (2016): ABO and Rhesus (D) blood group distribution among blood donors in rural south western Uganda: a retrospective study.

- Barakat, Ziyad (2007): Blood types and their relationship to some emotional personality traits among a sample of students, Al-Quds Open University Journal of Research and Studies, Issue (11), pp. 11-48.

- Belkacem, Mohamed and Hajj Chtouan (2016): Psychological stress and its relationship to the causes of school absence among secondary school students, University of Oran, Algeria, Journal of Psychological and Educational Sciences, 3 (1) 2016, pp. 112-136.

- Bufalja, Ghayath and Bahra Karima (2017): Blood types and their relationship to optimism and pessimism among a sample of middle school students in Camp, University of Oran 2, Center for the Geel of Scientific Research, The Geel of Human and Social Sciences Journal, Issue (34), pp. 29-41

- Essel, G. & Owusu, P.(2017): Causes of student's stress, its effects on their academic success and stress management by students Case study at Seinäjoki University of Applied Sciences, Finland, Theesis.

- Hasan, Baraa Muhammad (2008): Psychological tension and its relationship to self-efficacy among university students, Ministry of Higher Education and Scientific Research (Psychological Research Center), Journal of Psychological Sciences, Issue (13), pp. 193-249

https://bmcresnotes.biomedcentral.com/articles/10.1186/s13104-016-2299-5

- Ibrahim, Soliman Abdel Wahid Youssef (2010): Cognitive Neuropsychology, Itrac Printing and Publishing, Cairo, Egypt.

- Jacobson, B.H & Monaghan, T.P.(2015): Physical and Psychological Stress and Sleep Efficiency before and after Introducing a New Sleep Surface, Journal of sleep disorders & Therapy, Vol.(4), Issue3, PP.4-8.

- Lazarus, Richard S. (1981): Al-Persona, ed. 1, translated by Syed Muhammad Ghunaim, Dar Al-Shorouk, Beirut

- Lierde K.V. et al(2009): Effect of Psychological stress on Female Vocal Quality, Folia Phonitar Logop, 61, PP.105-111.

- Lindsay, J. and Hall K. (DT): Theories of Personality, translated by Farag Ahmed Farag and others, Egypt

- Maaly ,Ibrahim Bagus (2015): The effectiveness of a counseling program based on communication skills in reducing stress and improving a sense of psychological security among secondary sch`ool students, Al-Ahliyya Amman University, Al-Balqa Journal for Research and Studies, Volume (18), Issue (2), 2015, p. Pp. 101-119.

- Odeh, Maysoon Alwan and others (2016): Blood groups and their relationship to determining the level of some physical abilities of students of the Faculty of Physical Education, University of Babylon, Journal of Physical Education Sciences, Volume (9), Issue (3), pp. 51-69.

- Rabenu, E. & Yaniv, E.(2017): Psychological Resources and Strategies to Cope with Stress at Work, International Journal of Psychological research, Vol.10(2), PP. 8-15.

- Salih, Qasim Hussain (1988): The Character Between Theory and Measurement, Higher Education Press, Baghdad, Iraq.

- Schneiderman, N., et al (2008): Stress and heat: Psychological, Behavioral and Biological Determinants: Annu Rev Clin Psychol. Author manuscript, available in PMC 2008 October 16.

- Sharif, Nadia Mahmoud and others (2016): A training program for some life skills and its effect on reducing psychological stress among lower elementary school students in Jordan, Journal of Educational Sciences, Fourth Issue, Part Three, October 2016, pp. 200-229.

- Sharifi, M. et al (2015): The relationship between the big five personality factors with blood types in Iranian university students, Journal of, Journal of Health Psychology chemical and pharmaceutical research, 7(5), PP 233-240.

- Thanoun, Thamer Mahmoud and Manhal Khattab Sultan (2010): Psychological tension and its relationship to the level of athletic achievement of the teams of the colleges of the University of Mosul for some individual and team games, Al-Rafidain Journal for Sports Sciences, Volume (17), Issue (56), 2010, pp. 85-106.

- Toussaint, L. et al (2016): Effects of life time stress exposure on mental and physical heat in young adulthood: How stress and forgiveness protects health, June, 21(6): PP.1004-1014.

- Trovato, G.M., et al (2006): Psychological stress measure in type 2 diabetes, European review for medical and pharmacological sciences, 10, PP. 69-74.

- Yadav A., et al (2016): Association of psycho-wellenss with various blood type in young medical students, International Journal of research in medical sciences, Aug, 4(8), PP 3468-3472.